Device for forming eyes in metal strips



W. M. STIDWORTHY.

DEVICE FOR FORMING EYES IN METAL STRIPS.

APPLICATION FILED JUNE 8, I920- Patented Aug. 9, 1921.

VENTOR A ORNEY.

' quicklyaccomplished.

. '1 '0 all whom it may concern."

WILLIAM msrrnwortriiir, or H cKEr rsrowN, amass issaoao.

Be it known that'I, WILEIAM S'rmwoR- THY, a citizen of the United States and a resident of Hackettstown, county of Warren, and State of New Jersey, have invented certain new and useful Improvements in .Devices for Forming Eyes in Metal Strips, of which the following is a specification;

This invention relates to an-improved device for bending the ends of metal stripsto form eyes, and is illustrated and described as a machine for forming eyes in the ends of spring leaves, this beingt'hei use for which the invention is-primarily intendedL Y The invention consist-sot a device that is economically made and is eiiicient-in its operation and is alsoporta ble, being usually operated after it is -secured-in a viseor other ordinary shop fixture by means-of which itcan be securely lield-, thus makingi't unnecessary to establish in a'shop a' special base or machine for this purpose;- r

The invention is further designed: to pro vi'de adevice of this kind WillCll'lS' easily adjusted to take in differentwidths and. thicknesses of metalstrips, the adjustment being The deviceis so constructed that when the dog which grasps the end of the strip-is swung concentrically around a roller or other suitable annular element, the metal is. carried a'lon'g -with it and does not retreat at the start of the rotati ve movement, which is the-difficulty inrsome types of machines"forcarryingout" the operation .of forming eyes in springs and the likes l1 The invention is illustrated inthe accompanying. drawing, inwhich Figure 1 is a top 7 view of the device 'withthe' handle broken away. Fig. 2 is a side"view-of the; device shownin Fig. 1, and Fig. 3is a detail section on line 3+3 in Fig. l, but with theswinging element lowered jto: approximately the position it assumes at the beginning 01"- the bending operation; i- "f l y The: device comprises 'asuitable supper-H0 which is usually made substantially flat on the top, so that the metal strip 1 1, suchas 'a spring leaf or similar strip, cambestm iort ed, and in order to guide andi'approxiniately position the stripin the center'bf the 'support I arrange a. suitable gage 12, whi'c'h'is transversely adjustable, the adjustmentin the form shown being providedby moimting the: gage on a stud 13 ,on-which it is held in Specification of LettersI atent. Application filed; J nea,

they are prevented from rotating and thus DEvIc' roR' romvirn'sriyssm METAL STRIPS.

' Patented Au 95.1 921. 1920. Serial No. 38?;41-8.

its different adjusted positions by a; set

screw'l. V r

The rear end of the support is preferably provided with a means for securing it in a vise or similar clam-ping. means, Fig. 2"i ll ustrating, in dotted outline, thejaws 1'5 of a" vise which'securely hold the post 16, which is the means by which the su-laport-ishe'ld in position. 1 i q I n the forward end of thes11ppi'0rt i's the bending mechanismwhich comprises a fixed rotati ve element and also a swinging e16:- ment, the r-otz'ati-ve element comprising, a rollef'l? which is mounted-011 the end of the support and is spaced therefrom by m'eans of the bearing-blocks 1-8 and the pint'le or pivotal pin'19. 'Thep'intle 1 9 i'sread ilyremovable, fitting 'lbosel'y in perforations in the bearing blocksand also fitting loosely in' the perforation through the roller l7,so that a different size roller can easily be" installed; 7 The bearing" blocks 18 are adjustable relarelation "heretofore; mentioned", the form ShOWII COIYIPIlSlHg the-sciewethr -ead'ed shanks 20 which fit screw-{threadedholesinthe tive to the sup-portto biing about the spaced support} and it" will be r adil -understood that when they are turned they: are; raised or lowered, and after the p'i votal pi'n is inserted not only act as asap-port for 'the' 'roller', but I The swinging element is arrangedso that it.- can be swung concentrically rel'ativeto the rol lerythe preferred form being a y'oke 21-, the ends of which are perforated"to receive the pivotal pin 19 so that theyoke' al'so 'is su-p ported by the pivotal pin and is v freely rota- I table thereon. The yoke-2r is provided with A a handle22', usuallytwo orthree feet long; to give the requiredleverage, this handle being adjustable longitudinally the yoke, this longitudinal; adjustment being preferably provided by placing a screvwthr'ead 23 which operates in a fiXed-sc'rew-threaded bearing 'b1ock'24.

p The inner facesldfi the arms oftheyoke are provided with the grooves 25- iir which I slides a block 26 thisblock beingattached to f the end" or the-screw and being 'moved for- .ward an'd baokward with it'x" The block 26 hasa cam 27 f'mount'ed 'thereiiigf'usually on a pin 28,:the eam having ahandle 29; bymeans, of which the cam can be swung] X 5 I I Freely slidabl'e ahovethe camis"tlie dog 30, which is providedv with a gripping face, and I have found a positive grip secured by tapering the faces 31 to make the upper or forward end of the dogpointed, and by milling out or otherwise establishing the groove 32, parallel knife edges or ridges 33 are provided which, when forced against the end 'of the strip 11, tightly bind it and there is no slipping of the dog on the strip.

After the roller 17 is installed at its properly adjusted position, the strip 11 is placed on the support 10 the yoke being in the position shown in Fig. 8, with the handle 29 swung upward so that the dog 30 does not engage the strip and thus does not interfere with the insertion of the strip. The handle 29 is then swung in the direction of the handle 22 so as to bring the two handles conveniently together, this forcing the dog tightly aga nst the end of the strip 11. The yoke is then swung by means of the handle 29 in conjunction with the handle 22, and as it isswung, as shown in Fig. 2, it carries with itthe end of the strip which, on the 7 continued swin ing of the yoke, is formed into an eye. U sually one movement of the yoke to its limit of movement is sufficient for forming a complete eye, but if further twisting is desired the handle 29 can be swung to releasev the block and the yoke swung out of engagement withthe strip, and at a suitable point, by again swinging the handle 29 toward the handle 22, the dog once more engages the strip and a further forcing of theend of the strip to form a more com plete eye can be accomplished.

Vi hen the eye has been formed the pivotal pin 19 is withdrawn and the roller removed. If the roller is a bushing to be used within the eye it is, of course, left in place, but if the eye is to be used without a bushing the roller 17 is driven; out andv the operation is now complete. 7

It willbe evident that slight changesin the form and assembling of the parts can be made without departing from the scope of my invention. 1

I claim 1 A device for bending the ends of metal strips to form eyes comprising a support, a roller, means for mounting the roller so that it is adjustable relative to the support, a yoke swinging concentrically relative to the roller, a handle on the yoke, a bearing block adj ustable in the yoke, a campivoted in the bearing block, a handle on the cam, and a dog slid- I .able inithe yoke and against which the cam operates. a

2. A device' for bending the ends of metal strips to form eyes comprising a support, a roller,-means for mounting the roller so that it is adjustable relative to the support, a yoke adapted to swing around said roller, a block, primary adjusting means for fixing the position of the block on the yoke, a dog slidable in said yoke, and means mounted on said block for forcing said dog toward the roller.

3. A device for bending the ends of metal" blocks and in the roller, means adapted toswing concentrically relative to said roller, said means including a dog, and means for forcing said dog toward the roller.

4:. A device for bending the ends of metal strips to form eyes comprising a support, bearing blocks 'onrsaid support, the blocks and the support having coacting means wherebythe bearing blocks can be adjusted relative to the support, the bearing blocks having perforations therein, a roller having a perforation therein, a readily removable pintle in the perforations of thebearing blocks and in the roller, means adapted to swing concentrically relative to said roller, said means including a dog, a U-shaped yoke having its ends perforated, said perforations receiving the pivotal pin, a handle arranged in extension of said yoke and in screw-threaded connection therewith, a block on the end of the handle, a cam swinging on the block and adapted to bear against the dog, and a handle on said cam and disposed so as to be swung toward the first mentioned handle to force the dog toward the roller.

5. A device for bending the ends of metal strips to form eyes comprising a support, bearing blocks on said support, the blocks and the support having coacting .means whereby the bearing blocks can be adjusted relative to the support, the bearing blocks having perforations therein, a roller having a perforation therein, a readily removable intle in the perforations of the bearing locks and in the roller, means adapted to swing concentrically relative to said roller, said means including a dog, a U-shaped yoke having its ends perforated, said perforations receiving the pivotal pin, a handle arranged in extension of said yoke and in screwthreaded connection therewith, a block on the end of the handle, a cam swinging on'the block and adapted to bear against the dog, a handle on said cam and disposed so as to be swung toward the first mentioned handle to force thedog toward the roller, and a .transversely adjustablegage on said support in rear of said roller.

In testimony that I claim the foregoing, I have hereto set my hand, this i day of June,

WILLIAM M. STIDWORTHY. 

